To celebrate the release of 300 to DVD, the Guardian Unlimited is offering one fan a dream-fulfilling prize; the opportunity to be an extra in the Zack Snyder directed Watchmen.

300 is an intense film about the battle of Thermopylae where King Leonidas (Gerard Butler) and 300 Spartan warriors fought to the death against a massive Persian army. The graphic novel was written and illustrated by Frank Miller (Sin City).

Watchmen is an adaptation of the award-winning graphic novel written by Alan Moore, which tells the story of an alternate 1985 where superheroes exist, tensions between the United States and the Soviet Union are at an all time high. A vigilante uncovers a plot to discredit and murder various heroes while investigating the death of one of his teammates - a plot which leads to a conspiracy which could change the entire world.

CLICK HERE for your chance to enter the contest.